SU1555545A1 - Hydraulic system - Google Patents

Abstract

The invention can be used in hydraulic drives of agricultural machines. The purpose of the invention is to reduce the power consumed by the hydraulic drive for heating the working fluid. The hydraulic cylinders 1 of one-way action are connected by hydraulic lines 2, 3 of discharge and discharge to pump 4 and tank 5 via switchgear 6. Device 6 includes installed in one housing and overflow valve 7 connected to each other with control line 8, valve 9 and locking device 10 s cavity 11 controls. The juice of the spool 9 in the position "Device 10 is open to the drain" is made on-off with the ability to momentarily close line 8 and open valve 7 to drain into tank 5. Cavity 11 communicates with hydraulic line 2. At the time of opening valve 7, the juice is made with the possibility of forming a throttle slots 17, while the tank 5 is also discharged through the valve 7, which creates more pressure to open it. 1 hp f-ly, 2 ill.

Description

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Claims (2)

Claim 1. A hydraulic system comprising at least one single-acting hydraulic cylinder connected by discharge and drain lines to a pump and a tank through a switchgear including a spool and a shut-off device connected to the overflow valve by a control line, characterized in that, in order to reduce the hydraulic drive consumed power for heating the working fluid, the valve spool in the position of the locking device is open to drain. performed by two-position with the possibility of short-term overlap of the control line eniya and closing the relief valve followed by a full opening control line and the opening of the relief valve to drain the tank, wherein the control chamber of the locking device communicates with the discharge line. . 2. The system according to π, Ι, characterized in that the “valve spool in position’ ’” The locking device is open to drain and configured to form a throttle gap at the moment of opening the overflow valve. Figure 2.